Edit & Organize
Merge PDF
Combine multiple PDF files into one document, in the order you choose.
Open toolHighlight Text in a PDF
Highlight important passages on the pages of a PDF.
Edit & Organize
Drag & drop your PDF file here
PDF · up to 50 MB
Add a file to get started.
About Highlight PDF
Mark key passages in contracts, study notes or research papers just like with a highlighter pen. Drag across any part of a page and choose from four colours.
Highlights blend with the page so the text underneath stays dark, readable and selectable. You can move, recolour or delete highlights before saving, all in your browser.
How to use Highlight PDF
Add your file
Drag and drop one PDF file onto the upload area, or click “Select file” to choose from your device.
Highlight passages
Choose a colour and drag across the text you want to highlight. Click a highlight to move, recolour or delete it.
Click “Apply highlights”
Start processing and wait a moment while your file is prepared.
Download the result
Save the finished file to your device with the Download button.
Highlight PDF features
Processed in your browser
Your files are processed on your own device and are not uploaded to our servers.
No account needed
There's nothing to sign up for. Open the page and use the tool.
Works on any device
Use it on desktop, tablet or phone in any modern browser.
Highlight PDF FAQ
Highlight PDF accepts one PDF file. Each file can be up to 50 MB. Files are checked when you add them, so anything that isn't a valid PDF file is rejected with an explanation.
No. Highlight PDF runs in your browser, so your files stay on your device.
Yes. Highlights are drawn like a highlighter pen: the text underneath stays dark, readable and selectable. The highlights become a permanent part of the page.